Fix build_init vcxproj to correctly detect changes in config.h.

[mono.git] / mcs / class / System / System / Platform.cs

diff --git a/mcs/class/System/System/Platform.cs b/mcs/class/System/System/Platform.cs
index c45a33e66005cff43b6a826cd74b85c3c8c77128..b687c590f580272959a8304c787d3149524a6838 100644 (file)
--- a/mcs/class/System/System/Platform.cs
+++ b/mcs/class/System/System/Platform.cs
@@ -28,36 +28,56 @@ using System.Runtime.InteropServices;
 
 namespace System {
        internal static class Platform {
+               static bool checkedOS;
+               static bool isMacOS;
+               static bool isFreeBSD;
+
 #if MONOTOUCH || XAMMAC
-               public static bool IsMacOS {
-                       get { return true; }
+               private static void CheckOS() {
+                       isMacOS = true;
+                       checkedOS = true;
                }
 #else
                [DllImport ("libc")]
                static extern int uname (IntPtr buf);
-               
-               static bool checkedIsMacOS;
-               static bool isMacOS;
-               
-               public static bool IsMacOS {
-                       get {
-                               if (Environment.OSVersion.Platform != PlatformID.Unix)
-                                       return false;
 
-                               if (!checkedIsMacOS) {
-                                       IntPtr buf = Marshal.AllocHGlobal (8192);
-                                       if (uname (buf) == 0) {
-                                               string os = Marshal.PtrToStringAnsi (buf);
-                                               if (os == "Darwin")
-                                                       isMacOS = true;
-                                       }
-                                       Marshal.FreeHGlobal (buf);
-                                       checkedIsMacOS = true;
+               private static void CheckOS() {
+                       if (Environment.OSVersion.Platform != PlatformID.Unix) {
+                               checkedOS = true;
+                               return;
+                       }
+
+                       IntPtr buf = Marshal.AllocHGlobal (8192);
+                       if (uname (buf) == 0) {
+                               string os = Marshal.PtrToStringAnsi (buf);
+                               switch (os) {
+                               case "Darwin":
+                                       isMacOS = true;
+                                       break;
+                               case "FreeBSD":
+                                       isFreeBSD = true;
+                                       break;
                                }
-                               
-                               return isMacOS;
                        }
+                       Marshal.FreeHGlobal (buf);
+                       checkedOS = true;
                }
 #endif
+
+               public static bool IsMacOS {
+                       get {
+                               if (!checkedOS)
+                                       CheckOS();
+                               return isMacOS;
+                       }
+               }
+
+               public static bool IsFreeBSD {
+                       get {
+                               if (!checkedOS)
+                                       CheckOS();
+                               return isFreeBSD;
+                       }
+               }
        }
 }